Table 1.

Half-life of various Ig L chains in different cell lines

Cell line/ Ig L chain	NS1*	X63Ag8.653	H62
VκCκ (κNS1)	0.8	2.0; 2.1	2.0
VκCλ		1.8; 1.7	2.3
VλCλ (λFS62)	3.5	3.2	3.3; 3.7
VλCκ		3.0; 4.0	>6; >6

^*Half-lives (given in hours) of κ_NS1 and λ_FS62 Ig L chains in NS1 cells were previously determined (15, 16). All other half-life determinations of the Ig L chains indicated were performed as described in Materials and Methods, and the results of independent determinations are shown.